Malicious PDF — malware analysis report

Static analysis result for SHA-256 30b8607d0d6b30ea…

MALICIOUS

PDF

92.8 KB Created: 2021-03-15 10:55:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 244de400bf17b25de9d393ef63fb9364 SHA-1: 43b17d04293570d254347db58872008cdb15648b SHA-256: 30b8607d0d6b30ea6b6fd62185b96e9c0702b391048a15a8db9500e4bedc0378
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing and potential trojan distribution. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to various PDF files. The presence of a 'download' button lure further supports the malicious intent of distributing or directing users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://maypoin.ru/award?keyword=design+diaries+creative+process+in+graphic+design+pdf PDF link annotation
    • https://kesoxebexug.weebly.com/uploads/1/3/2/6/132681937/depatumeniwadine.pdfIn PDF document text
    • https://bikigevoxepasi.weebly.com/uploads/1/3/4/7/134716722/8715184.pdfIn PDF document text
    • https://dusoveri.weebly.com/uploads/1/3/1/0/131070325/bovef.pdfIn PDF document text
    • https://fajorisovobune.weebly.com/uploads/1/3/4/7/134752278/8285225.pdfIn PDF document text
    • https://zaxefuki.weebly.com/uploads/1/3/5/2/135299090/mogolepepuku.pdfIn PDF document text
    • http://creditinquiry.info/3-year-old_milestones_gifted208is.pdfIn PDF document text
    • https://xepevuke.weebly.com/uploads/1/3/0/7/130775471/bajekafa.pdfIn PDF document text
    • http://kuxakedu.iblogger.org/casio_edifice_wr100m_manual.pdfIn PDF document text
    • http://differencecheats.net/pavijowemoromaputodifuvk76h.pdfIn PDF document text
    • http://vbruti.site/fast_and_furious_turbo_charged_watch_online0pu6b.pdfIn PDF document text
    • https://popajilosofov.weebly.com/uploads/1/3/0/7/130776408/4299682.pdfIn PDF document text
    • https://rugibabolunape.weebly.com/uploads/1/3/1/4/131454120/bozupujiwogo-noleneke.pdfIn PDF document text
    • https://ronurakegilapoz.weebly.com/uploads/1/3/4/8/134852428/4047469.pdfIn PDF document text
    • http://xekedibu.iblogger.org/dizaruxiniwulusikof.pdfIn PDF document text
    • http://helplnstagramcontact5087423.com/vaderujug3zc81.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dinorafox.epizy.com/keston_hiura_scouting_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/android_get_file_path_assets.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/bhavageethe_kannada_songs_free.pdfIn PDF document text
    • http://bumilamufitilu.epizy.com/bootstrap_responsive_table_template_free.pdfIn PDF document text
    • http://zosanugu.epizy.com/toliv.pdfIn PDF document text
    • http://naziniri.epizy.com/vamonemupixagikux.pdfIn PDF document text
    • http://futezazunup.rf.gd/acca_f2_kaplan_exam_kit.pdfIn PDF document text
    • http://nusumonujarufed.rf.gd/does_gopro_hero_7_black_need_waterproof_case.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/ads_remover_apk.pdfIn PDF document text
    • http://levowemorunob.epizy.com/tajugipuwawevubewut.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012ea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA8 5444 bytes
SHA-256: e69dbeb1c459f74171a9567e068dd281f9c793dc4782dddda857a7a1850c2b33
font_01_sfnt_off0001413d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1413D 10676 bytes
SHA-256: 5760fbbd2a52b08ef6ff3e58b4f3fc871be70102f2179eb1ab900f90835bfae1